Evolutionary advantage of formation and maintenance of Dikarya?

11 September 2017 1 10K Report

The formation of a dikaryon is a plesiomorphic character for the subkingdom Dikarya, including the Basidiomycota and Ascomycota. What evolutionary advantage(s) do(es) the maintenance of dikarya impart? Does proliferation of dikaryotic mycelia and prolonging the stage between Plasmogamy and Karyogamy provide some evolutionary advantage (e.g., more opportunities for genetic recombination)?

Johann Heider

Nothing is really known about this, so it is open for many speculations. My favorite (unproven) idea is that the individual nuclei may be better suited to control the local cytoplasm environment in the enlongated cells of a hyphal organism. Fused nuclei would need to reach out twice as far with their RNA species than separate ones.

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Science method

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Ecology

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